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Lenart and Vašku (2016) [45] have also invoked evolvability as the main mechanism driving evolution of ageing. However, they proposed that even though the actual rate of aging can be an adaptation the aging itself is inevitable. In other words, evolution can change the speed of aging but some ageing no matter how slow will always occur.
Ageing and mortality of the individual organism became more evident with the evolution of eukaryotic sexual reproduction, [17] which occurred with the emergence of the fungal/animal kingdoms approximately a billion years ago, and the evolution of seed-producing plants 320 million years ago.
Experimental populations of Drosophila Melanogaster, and other organisms, however, exhibit age-specific mortality rates that plateau well before reaching 100%, making mutation accumulation alone an insufficient explanation. It is suggested instead that mutation accumulation is only one factor among many, which together form the cause of aging.
Strength of natural selection plot as a function of age. The antagonistic pleiotropy hypothesis (APT) is a theory in evolutionary biology that suggests certain genes may confer beneficial effects early in an organism's life, enhancing reproductive success, while also causing detrimental effects later in life, contributing to the aging process.
Senescence (/ s ɪ ˈ n ɛ s ə n s /) or biological aging is the gradual deterioration of functional characteristics in living organisms. Whole organism senescence involves an increase in death rates or a decrease in fecundity with increasing age, at least in the later part of an organism's life cycle.
In biogerontology, the disposable soma theory of aging states that organisms age due to an evolutionary trade-off between growth, reproduction, and DNA repair maintenance. [1] Formulated by British biologist Thomas Kirkwood , the disposable soma theory explains that an organism only has a limited amount of resources that it can allocate to its ...
350 BCE — The Greek philosopher Aristotle, arguably the first philosopher to make a serious attempt to scientifically explain aging, proposes his thesis on aging.He suggests that aging is a process by which human and animal bodies, which are naturally hot and wet, gradually become dry and cold, and theorizes that more moisture delays aging.
Evolution of ageing; A. Aging by design theory; Aging theories based on evolvability; Aging theories based on group selection; Antagonistic pleiotropy hypothesis; D.